On Wed, 2011-07-20 at 13:32 -0400, Brandon Allbery wrote:
> of them *will* be safe) — but there is no way for it to crowbar
> pointer equality tests in that case.
I have looked up crowbar in a number of dictionaries of slang and
informal usage... and still have no idea what you just said. Can you
reword it?
Sorry, EE usage: a crowbar circuit forces a fuse to blow when something goes out of tolerance. More generally, it means forcing a failure.
The point, I think, is that if pointer equality testing really does what
it says, then there shouldn't *be* any correct implementation in which
Maybe it will help if I put it this way: there's no guarantee that your pointer equality test is testing anything that has any actual relevance to how it's evaluating the expression. In extreme cases, there might not even be anything to test.